chromaticity vs warmth

chromaticity

noun
  • An objective specification of the quality of a colour, regardless of its luminance. 

warmth

noun
  • The effect of using mostly red and yellow hues. 

  • Friendliness, kindness or affection. 

  • A moderate degree of heat; the sensation of being warm. 

  • Fervor, intensity of emotion or expression. 

How often have the words chromaticity and warmth occurred in a corpus of books? (source: Google Ngram Viewer )